[Linux-aus] SPF problems too
russell at coker.com.au
Sat Jan 16 00:10:39 AEDT 2016
On Fri, 15 Jan 2016 11:04:45 PM Steve Walsh wrote:
> As I've already indicated, we're working to fix this issue, but that's
> why AC is seeing mail come in out of order. It's the way the software
> unfortunately operates. It's a bit of a stretch to jump from the way the
> software operates to indicate that people aren't doing their job, or
> that the system is broken, and just being ignored, but, congratulations,
> you made it.
It's good that the policy regarding moderation has been publicised. Prior to
that it's not unreasonable for people to suspect that as a cause of mail
delay. Lots of other lists are run by people who pull stunts like moderating
people without telling them.
I think that ac overreacted a bit, but I don't think that they were being
particularly unreasonable in suspecting moderation. In many other situations
such a suspicion could be correct.
> On 01/15/2016 08:57 PM, Russell Coker wrote:
> > Thanks for the vote of confidence in my abilities. I do make mistakes
> > on occasion, and in retrospect just adding a DMARC entry and sending
> > mail to lists was a mistake. But a correctly behaving list won't
> > unsubscribe people because of a mistake made by one member.
> In all seriousness, how will the list server know what happened here?
> You were experimenting with DMARC, there was a configuration error made
> ( a mail server error? from RC? uh oh Brent, better find some tightey
> whiteys), and a flurry of bounces came in. Mailman did what mailman is
> programmed to do.
The mail server won't know. It just has to be able to send out mail that is
valid according to DKIM/DMARC checks.
> On 01/15/2016 09:06 PM, Russell Coker wrote:
> > Also do we even have a problem that greylisting will solve? The server
> > does SPF checks so anyone who has a SPF record with -ALL won't have
> > their mail spoofed. The server will only accept mail from subscribers
> > so we won't have a problem of spam from random addresses being sent.
> As you've probably seen in the mail headers, the host is called "mailhost".
> "mailhost" does many things for LA, of which the mailman lists is only a
> small thing. It does all the SMTP and IMAP for the LCA and PyCon-AU
> teams, and, when we have the chance, it will do it all for Linux
> Australia. It also does mail filtering for the various RT instances that
> are in use by LA, LCA, PYCON and others. This means we get a lot of
> spam. A lot. Any of the list admins will tell you how much spam gets
> through the filters as it stands, even when we're quite aggressive.
It is possible to have greylisting for some accounts, the above is one of the
first Google hits for "greylisting per user". I might do something like this
for the LUV server as it will soon be hosting IMAP accounts as well as mailing
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